Granted Patent B2

US 12,366,831 · App. 17/749,653 · Granted Jul 22, 2025

Inventors: Serge Lukas Zihlmann (Gasel, CH); Johannes Peter Kind (Bern, CH)

Assignee: mb-microtec ag

G04F5/12C03B15/14C03B23/057G04F5/14B81B3/0078B81B2201/058B81C1/00682B81C2203/0145B81C2203/0172

Abstract

Claims (22)

1. A method of fabricating one or more glass cells for enclosing a gas, the method comprising:

drawing one or more glass capillaries from a source of glass material comprising aluminosilicate, the drawing comprising:

setting a cross section of the one or more glass capillaries to a height of approximately 0.15 to 5 mm and a width of approximately 0.3 to 10 mm; and

drawing the one or more glass capillaries to a length of approximately 5 to 1500 mm;

performing a first conditioning of one or more inner surfaces of the one or more glass capillaries, the first conditioning comprising a wet process, a dry process, or wet and dry cleaning processes;

sealing one or more first ends of the one or more glass capillaries by applying thermal energy to the one or more first ends;

performing a second conditioning of the one or more inner surfaces after the sealing, the second conditioning comprising:

a wet process, a dry process, or wet and dry cleaning processes;

heating the one or more glass capillaries to accelerate degassing of the one or more inner surfaces; and

evacuating impurities from the one or more glass capillaries using a vacuum system;

purifying the one or more glass capillaries to increase a purity of a gas used to fill the one or more glass capillaries, the purifying comprising:

filling the one or more glass capillaries using one or more gases; and

evacuating the one or more glass capillaries after the filling;

filling the one or more glass capillaries using the gas after the purifying;

pressurizing the one or more glass capillaries to a given pressure;

sealing one or more second ends of the one or more glass capillaries using thermal energy; and

dividing each of the one or more glass capillaries using thermal energy to produce the one or more glass cells that are seamless and hermetically sealed, wherein a dielectric loss factor of the one or more glass cells is approximately 200·10 −4 or less for a sub-terahertz frequency.

2. The method of claim 1 , wherein the gas is a dipolar gas.

3. The method of claim 2 , wherein the dipolar gas comprises carbonyl sulfide (OCS).

4. The method of claim 1 , wherein the drawing of the one or more glass capillaries from the source of glass material further comprises setting a wall thickness of the one or more glass capillaries to approximately 50 microns to 1 mm.

5. The method of claim 1 , wherein the given pressure is approximately 0.001 to 100 mbar.

6. The method of claim 1 , wherein the purifying further comprises purifying the gas to a purity of approximately 90% or greater.

Assignments (2)

Continuity (1)

References Cited (30)